[9front] Re: add "-n namespace-file" flag to tftpd

[Silas McCroskey <inkswinc@gmail.com>]

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wow, I never realized gmail's plaintext mode suckage extended to
converting tabs to spaces as well. Attaching separately too.

- sam-d

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from postmaster@1ess:
The following attachment had content that we can't
prove to be harmless.  To avoid possible automatic
execution, we changed the content headers.
The original header was:

	Content-Type: text/x-patch; charset="US-ASCII"; name="tftpd-n.patch"
	Content-Disposition: attachment; filename="tftpd-n.patch"
	Content-Transfer-Encoding: base64
	Content-ID: <f_kkw723og0>

[-- Attachment #2.2: tftpd-n.patch.suspect --]
[-- Type: application/octet-stream, Size: 1284 bytes --]

diff -r 6f8455ea95e6 sys/man/8/dhcpd
--- a/sys/man/8/dhcpd	Sat Jan 23 04:21:08 2021 +0000
+++ b/sys/man/8/dhcpd	Mon Feb 08 06:28:01 2021 +0000
@@ -42,6 +42,8 @@
 .IR homedir ]
 .RB [ -x
 .IR netmtpt ]
+.RB [ -n
+.IR namespace-file ]
 .SH DESCRIPTION
 These programs support booting over the Internet.
 They should all be run on the same server to
@@ -318,6 +320,9 @@
 .B r
 Restricts access to only those files rooted in the
 .IR homedir .
+.TP
+.B n
+Sets the namespace file (default /lib/namespace).
 .PD
 .SH FILES
 .BR /lib/ndb/dhcp "    directory of dynamic address files
diff -r 6f8455ea95e6 sys/src/cmd/ip/tftpd.c
--- a/sys/src/cmd/ip/tftpd.c	Sat Jan 23 04:21:08 2021 +0000
+++ b/sys/src/cmd/ip/tftpd.c	Mon Feb 08 06:28:01 2021 +0000
@@ -93,6 +93,7 @@
 char	*dirsl;
 int	dirsllen;
 char	*homedir = "/";
+char	*nsfile = nil;
 char	flog[] = "ipboot";
 char	net[Maxpath];
 
@@ -138,6 +139,9 @@
 	case 'x':
 		setnetmtpt(net, sizeof net, EARGF(usage()));
 		break;
+	case 'n':
+		nsfile = EARGF(usage());
+		break;
 	default:
 		usage();
 	}ARGEND
@@ -744,7 +748,7 @@
 	if(fd < 0 || write(fd, "none", strlen("none")) < 0)
 		sysfatal("can't become none: %r");
 	close(fd);
-	if(newns("none", nil) < 0)
+	if(newns("none", nsfile) < 0)
 		sysfatal("can't build namespace: %r");
 }